Boiler-door air flue



Oct. 29, 1929. QWEN 1,733,901

BOILER DOOR AIR FLUE Filed Nov. 18, 1926 yHH" um l W /6 2 /5 Z5 7 INVENTOR ATTO R N EY Patented Oct. 29, 1929 UNH'E'ED STA? MORRIS OWEN, F OAK PARK, ILLINOIS' BOILER-DOOR AIR .FL'UE- This invention has particular relation to combustion devices primarily adapted for use upon boilers and furnaces to impregnate gases collecting above a fire bed with a quantity of oxygen to permit said gases to be burned instead of passing through a flue.

Another object of the invention comprehends means for introducing and heating the oxygen precedent to mixing with the gases.

More specifically stated the aforementioned means embodies a regulating means to control the ingress of the oxygen.

With the above and other objects in view, the invention further consists of the following novel features and details of construction to be hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the appended claim.

In the drawing:

Figure 1 is a sectional view of the invention as applied.

Figure 2 is a longitudinal sectional view taken through the invention while in use.

Figures 3 and 4 are end elevations of the device upon the opposed sides of a fire box door.

Referring to the drawing in detail, wherein like characters of reference denote corresponding parts, the reference character 10 indicates a fire box door having an opening 11. Companion frusto-conical shaped members 12 and 13 are carried upon the outer and inner sides of thedoor communicate with said opening 11. A neck 14 protrudes centrally of the 5 member 12 and which is adapted to receive within the outer end thereof a sleeve member 15 carrying a reticulated disk 16. An extension 17 carried by the member 13 is disposed in an opposite direction with respect to that of the neck 14. Said casing 17 is preferably of elongated configuration. An elongated extension 18 is sli'dably mounted within the casing 17 and held in a desired position by set screws 19 carried by the casing 17 and adapted for biting engagement therewith. Said extension is hollow and provided with partition members 20 defining a central bore disposed longitudinally thereof. The adjacent ends of the partitions 20 in juxtaposition to the outer end of the extension are disposed in spaced relation thereto. Auxiliary partition members 21 are arranged in spaced relatlon between'said partitions 20 and the inner side walls of the extension 18 and having the inner ends thereof disposed in spaced relation to the adjacent end thereof. Guide lugs 22 carriedupon the outer end of the extension 18 are adapted to receive the side edges and slidably mount a door 23 therebetween to close the central bore of theextension. The opposed end of the extension is closed exceptin for the discharge end of thecentral bore. u'ide ears 24 are carried at this end and adapted to receive flange portions 25; carried upon the inner end of a shank 26 communicating with said bore and having a dome-shaped nozzle 27 upon the inner end thereof. Said nozzle is provided with a transversely disposed slotted portion 28, the purpose of which will be presently apparent. a

In the use and operation ofthe present invention the ingress of air within the fire box is introduced through the foraminated disk 16 and within the compartment as defined between the respective members 12 and 13 respectively wherein said air is heated. The draft of the fire box will cause said air to be sucked through the extension 18 inthe manner as illustrated in Figure 2 of the drawing and evenly'spread over the fire bed through the slotted portion 28 to mix with gases emitted therefrom whereby combustion. will be aided, the gases will be burned, heated air will be disposed above the fire bed to conserve 7 fuel, preventing less smoke and attaining the 5 benefit of said gases instead of allowing'the same to pass through flues and other exits. The course, in the introduction of the oxygen, is indicated by the arrows in Figure 2 of the drawing; the course is disturbed and interrupted by the relative arrangement of the re-- spective partitions 20 and 21 respectively. The door 28 is disposed within the outer end of the extension 18 to close the adjacent end of the central bore to prevent a direct draft within the fire box. In the instance of a fuel throwing off excessive gas due to'the fact that insufiicient oxygen was mixed with the gas the door 23 is then removed-topermit a direct draft and consequently more air or 1.

oxygen could be introduced to overcome the gaseous condition. y

The invention is susceptible of various changes in its form, proportions and minor 5 details of construction and the right is herein reserved to make such changes as'properly fall within the scope of the'appended claims.

Having thus described my invention, What is claimed is:

10 A boiler door air flue'comprising com- 7 panion members carried upon the opposite sides thereof to provide a heating compartment therebetween, a neck outwardly projected from the outermost of the members, a

Y 1 casing projecting outwardly from the innermost of the members, an extension slidably and adjustably mounted. within the casing having a discharge nozzle upon one end, par-- tit-ion members disposed longitudinally with- 0 in the extension to provide a central bore having communication at one end with the nozzle and spaced from the opposed end of extension, auxiliary partition members disposed in parallelism with that of the first mentioned partitions being spaced from the extension adjacent the nozzle to permit air to b drawn the length of the extension and rearv wardly and forwardly therethrough for final 'disposition'and discharge through the nozzle in a preheated state, and a reticulated mmr her carried by the neck'adapted to regulate ingress of air within the compartment defined between the members.

In testimony whereof I affix my signature.

MORRIS OWEN. 

